Fertilizers — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
NORMA vydána dne 1.5.1981
Designation standards: ISO 5314:1981
Publication date standards: 1.5.1981
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: International technical standard
Kategorie: Technické normy ISO
Description / Abstract: The method consists in distilling of the ammonia from an alkaline solution, absorbing in an excess of standard volumetric sulphuric acid solution and back-titrating with standard volumetric sodium hydroxide solution. It is applicable only in the absence of urea or its derivatives, of cyanamide and of organic nitrogenous compounds.